#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#

def max(x, y):
    return x if x > y else y


def check(a, b, c, d):
    res1 = max(a, b)
    res2 = max(c, d)
    return max(res1, res2)


print(check(11, 2, 3, 4))
